## Abstract

A loop transfer recovery (LTR) design method with a proportional integral (PI) observer is proposed. It is based on the H^{∞} optimal observation via factorization approach. A general controller structure consisting of a robust linear functional observer and state feedback is used in the feedback control system. A parameterization for all PI observers is given. The interconnection between the optimal LTR problem and H^{∞} optimal observation problem using PI observer for the given system is shown. Analysis indicates that they are exactly the same. Based on the results of the H^{∞} optimal observation, the optimal LTR design is solved in the general framework of the H^{∞} optimization. The proposed method is effective for both minimum phase and non-minimum phase systems. The loop transfer and the disturbance attenuation properties can be recovered simultaneously using this method. A systematic design procedure of optimal LTR based on H^{∞} optimization is presented.

Original language | English |
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Pages (from-to) | 786-790 |

Number of pages | 5 |

Journal | Proceedings of the American Control Conference |

Volume | 1 |

State | Published - 1997 |

Event | Proceedings of the 1997 American Control Conference. Part 3 (of 6) - Albuquerque, NM, USA Duration: Jun 4 1997 → Jun 6 1997 |

## ASJC Scopus subject areas

- Electrical and Electronic Engineering

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